What is it?
SEO, search engine optimization, realizes that search engines, like Google, use algorithms to rate and rank websites. So, SEO works within those parameters to optimize:
In-depth, high quality content, keyword research, keywords, quality and freshness
Architecture-URLs, page load speed, internal links, crawl-ability, mobile apps
HTML-page titles and headings, data and meta descriptions
Trustworthiness- authority, engagement, reputation
User experience (UX) and User Interface (UI)
Linking- value, anchors, backlinks
User specifics- country, locality, user experience, history, intent
And minimize toxins affecting websites- cloning, schemes, stuffing, hiding, piracy, intrusiveness
How does SEO benefit your business? When a website is optimized according to the SEO best practices, more people will see your website when they are searching for your type of business or service by increasing your page rankings (the lower your ranking number, the better your ranking) which increases traffic to the site, conversions and sales. Basically, search engines want your company to give customers what they want and need to use your website. These optimizations are the elements of what make a great website.
Referenced from https://searchengineland.com/guide/seo